LVM Resize a Filesystem

AIX

Extend a Filesystem

1. # chfs -a size=+<additional size>M <absolute path to filesystem>

Reduce a Filesystem

1. # chfs -a size=-<reduced size>M <absolute path to filesystem>

Linux

Extend an ext4 Filesystem

1. Increase the size of the logical volume.

   # lvextend -L +<size>[M | G] /dev/<volume_group>/<logical_volume>

2. Resize the underlying filesystem

   # resize2fs /dev/<volume_group>/<logical_volume>

Extend an xfs Filesystem

1. Increase the size of the logical volume.

   # lvextend -L +<size>[M | G] /dev/<volume_group>/<logical_volume>

2. Resize the underlying filesystem

   # xfs_growfs -d </path/to/filesystem>

Reduce a Filesystem

1. Note: You may have to change to runlevel 1 in order to unmount.
2. Backup your data!
3. Dismount the filesystem before reducing the size.

   # umount /dev/<volume group>/<logical volume>

4. Force check the filesystem to ensure it is clean. DO NOT RUN e2fsck IF THE FILESYSTEM IS MOUNTED.

   # e2fsck –f /dev/<volume group>/<logical volume>

5. Reduce the filesystem.

   # resize2fs /dev/<volume group>/<logical volume> [+ | -]<size in MB>M

6. Reduce the logical volume.

   # lvreduce –L -<size in MB>M /dev/<volume group>/<logical volume>

7. Re-check the filesystem to ensure it is clean.

   # e2fsck –f /dev/<volume group>/<logical volume>

8. Mount the filesystem.

   # mount /dev/<volume group>/<logical volume>

Further Reading

1. IBM pSeries and AIX Information Center